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As a further elaboration of the proposal of Ref. [1] we address theconstruction of Standard-like models from configurations of stacks oforientifold planes and D-branes on an internal space with the structure${(Gepner model)^{c=6} \times T^2}/Z_N$. As a first step, the construction ofD=6 Type II B orientifolds on Gepner points, in the diagonal invariant case andfor both, odd and even, affine levels is discussed. We build up the explicitexpressions for B-type boundary states and crosscaps and obtain the amplitudesamong them. From such amplitudes we read the corresponding spectra and thetadpole cancellation equations. Further compactification on a T^2 torus, bysimultaneously orbifolding the Gepner and the torus internal sectors, isperformed. The embedding of the orbifold action in the brane sector breaks theoriginal gauge groups and leads to N=1 supersymmetric chiral spectra. Whenevereven orbifold action on the torus is considered, new branes, with worldvolumetransverse to torus coordinates, must be included. The detailed rules forobtaining the D=4 model spectra and tadpole equations are shown. As anillustration we present a 3 generations Left-Right symmetric model that can befurther broken to a MSSM model.Comment: 40 pages, 2 figures, added references, table 3 correcte

On SUSY standard-like models from orbifolds ofD= 6 Gepner orientifolds